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WorksheetsComputed Radiography
Total questions: 20
Worksheet time: 2hrs 40mins
Which of the following components is NOT utilized for computed radiography (CR) system?
Imaging plate reader
Imaging plate
Developer chemical
Protective layer
Which of the following material may be used in the construction of the computed radiography (CR) imaging plate outer cassette?
Carbon fibers
Lead
Paper
Stone
Which of the following is the function of the conductive layer in the computed radiography (CR) imaging plate?
Binding the phosphors to the phosphor layer.
Increase electrostatic charge.
Decreasing electrostatic charge.
Binding the photons to the phosphor layer.
Which layer of the computed radiography (CR) imaging plate prevents unwanted light and background radiation from affecting the unprocessed latent image?
Conductor layer
Light shield layer
Support layer
Color layer
Which layer of the computed radiography (CR) imaging plate is responsible for creating the latent image from the transmitted x-ray photons exiting the patient?
Protective layer
Phosphor layer
Conductive layer
Light shield layer
Which of the following options is the correct answer to the question: The phosphor layer of the computed radiography (CR) imaging plate is composed of _________?
Barium Fluorohalides & Amorphous Selenium
Amorphous Silicon & Europium Activator
Barium Fluorohalides & Europium Activator
Amorphous Silicon & Cesium Iodide
What the term "latent image" refers to?
Number of x-ray photons leaving the patient
Interactions of the x-ray photons within the imaging plate
Stored energy within the fluorohalides
Release of energy from the fluorohalides
What does the thin, active layer within the computed radiography (CR) cassette stored?
Manifest image
Patient's metadata
Exam's metadata
Latent Image
What is another name for the conductive layer of a computed radiography (CR) imaging plate?
Support layer
Antistatic layer
Base layer
Static layer
Which interaction occurs when an x-ray photon is absorbed by the phosphor layer of a computed radiography (CR) plate?
Characteristic interaction
Photoelectric interaction
Compton interaction
Classical interaction
Which of the following materials is responsible for storing the latent image within the computed radiography (CR) imaging plate?
Helium-neon
Rare-earth metals
Photo-stimulable phosphor (PSP)
Amorphous selenium
What is the name of the device that is needed to transfer the latent image within the imaging plate to a viewable digital radiograph?
Gamma camera
Linac
Imaging plate reader (digitizer)
Scintillator
What is the purpose of the laser within the computed radiography (CR) reader (digitizer)?
Release latent image from the photo-stimulable phosphor (PSP) layer
Release latent image from the conductor layer
Erase the latent image from the photo-stimulable phosphor (PSP) layer
Erase the latent image from the support layer
What is the role of the photomultiplier tube (PMT) within the
computed radiography (CR) reader system?
Collect light photons
Erase all latent image
Release the latent image from the imaging plate
Convert the analog data to a digital signal
Hey Aria, Michael, and Abigail! Can you tell me what the primary function of the analog-to-digital converter (ADC) within the computed radiography (CR) plate reader is? Is it to convert:
x-ray to light photons
x-ray photons to electrical signal
electrical signal to x-ray energy
light photons to digital signal
Which of the following component may be used in place of the photomultiplier tube to work faster within a CR reader system?
a-Se
TFT
CCD
ADC
When should a computed radiography (CR) imaging plate be processed
to prevent loss of the latent image data?
As soon after exposure as possible
3 minutes after exposure
5 minutes after exposure
10 minutes after exposure
Inside the CR reader, the laser will hit the imaging plate in
the zig-zag pattern known as ______________ pattern
Symmetrical
Plaster
Blaster
Raster
Inside CR reader, after all the latent image is processed using the laser,
the image plate is completely erased by exposing the imaging plate to an intense ______________
red light
white light
blue light
green light
What is an advantage of a photomultiplier tube (PMT) based CR plate reader as compared to charge-coupled device (CCD) type?
increase imaging plate reading time
increase sensitivity of the imaging plate reading
increase the density and resolution of image produce
increase the scattered radiation absorption
